Didn't read through all of the suggestions so sorry if this is a repeat, but aside from what everyone else was saying---
- creating a cut off point before chaos hits. i had friends who were pre-registered as number 3xx and they didn't get to park on the grounds because of space even though . it didn't seem fair that people were able to register and park on the grounds the day of the show when so many pre-registers didn't even have space to park. Again, charging a registration fee would cut back on this problem.
I know that no-show pre-registers make this difficult, but it was just something that didnt sit well with me.
just my opinion but awesome show regardless!